Date Calculator
Add or subtract days, weeks, months, or years from any date and find days between two dates.
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How to Use This Calculator
- Choose between 'Date Difference' mode to calculate time between dates, or 'Add/Subtract' mode to calculate a new date
- For Date Difference: Enter start and end dates, then click 'Calculate Difference'
- For Add/Subtract: Enter a base date, choose add or subtract, enter time values, then click 'Calculate'
- View results showing the calculated difference or new date
- Business days calculation automatically excludes weekends
Formula
Date Difference: End Date - Start Date | Add/Subtract: Base Date ± (Years + Months + Weeks + Days)
Frequently Asked Questions
How do I calculate the difference between two dates?▼
Select the 'Date Difference' mode, enter your start and end dates, and click 'Calculate Difference'. The calculator will show the time between dates in years, months, days, weeks, and business days.
What are business days?▼
Business days exclude weekends (Saturday and Sunday). This is useful for calculating working days between dates for project planning, billing, or employee time tracking.
How do I add or subtract time from a date?▼
Switch to 'Add/Subtract' mode, select your base date, choose whether to add or subtract, enter the amount of time (years, months, weeks, days), and calculate. This is useful for finding future deadlines or past dates.
Can I add different time units together?▼
Yes! You can combine years, months, weeks, and days in a single calculation. For example, add 1 year, 3 months, 2 weeks, and 5 days all at once.